TABLE 5.

Significant predictors of time constant (TC) in each group based on the generalized mixed model with gamma (log) distribution for TC, compound variances assumed for the random covariance, and diagonal covariance structure assumed for the residual covariance.

	mTBI					Control
		b	95% CI		p		b	95% CI		p
Fixed effects
Intercept		2.6	2.5	2.7	0.00		2.3	2.1	2.6	0.00
Effort level
25%							25%	0.6	0.3	0.9
50%							50%	0.2	0.0	0.4
Time on task							0.2	0.0	0.4	0.05
Edge
	CO_rSTG-lClaus	−0.2	−0.5	0.0	0.05	CO_lSFG-rmedFG	0.2	0.0	0.4	0.10
						FP_llIPL-rIPL2	0.6	0.3	1.0	0.00
						FP_rAG-lIPL3	0.4	0.1	0.7	0.01
						FP_rMFG2-lIPL3	−0.2	−0.5	0.0	0.03
						FP_lIPL2-lIPL3	−1.1	−1.4	−0.7	0.00
Effort level × time on task
						[Effort = 25] × [Half = 1]	−0.6	−0.9	−0.2	0.00
						[Effort = 50] × [Half = 1]	−0.2	−0.5	0.1	0.26
Random effect covariance
Participant		0.0	0.0	0.2	0.24		0.1	0.0	0.1	0.0
Residual effects
	[Effort = 25] × [Half = 1]	0.2	0.1	0.5	0.04	[Effort = 25] × [Half = 1]	0.1	0.0	0.3	0.06
	[Effort = 25] × [Half = 2]	0.1	0.0	0.2	0.02	[Effort = 25] × [Half = 2]	0.2	0.1	0.4	0.01
	[Effort = 50] × [Half = 1]	0.1	0.1	0.3	0.01	[Effort = 50] × [Half = 1]	0.2	0.1	0.3	0.00
	[Effort = 50] × [Half = 2]	0.2	0.1	0.5	0.01	[Effort = 50] × [Half = 2]	0.1	0.1	0.2	0.00
	[Effort = 75] × [Half = 1]	0.3	0.1	0.8	0.02	[Effort = 75] × [Half = 1]	0.2	0.1	0.3	0.00
	[Effort = 75] × [Half = 2]	0.2	0.1	0.5	0.01	[Effort = 75] × [Half = 2]	0.1	0.1	0.3	0.01

l, left; r, right hemisphere; 2 or 3 indicate multiple nodes within the same gyrus (see Supplementary Table 1 for coordinates and labels for nodes); ACC, anterior cingulate cortex; AG, angular gyrus; Claus, claustrum; IPL, inferior parietal lobule; medFG, medial frontal gyrus; MFG, middle frontal gyrus; STG, superior temporal gyrus.